github.com/pion/dtls/v2@v2.2.12/examples/dial/verify/main.go (about)

     1  // SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
     2  // SPDX-License-Identifier: MIT
     3  
     4  // Package main implements a DTLS client using a client certificate.
     5  package main
     6  
     7  import (
     8  	"context"
     9  	"crypto/tls"
    10  	"crypto/x509"
    11  	"fmt"
    12  	"net"
    13  	"time"
    14  
    15  	"github.com/pion/dtls/v2"
    16  	"github.com/pion/dtls/v2/examples/util"
    17  )
    18  
    19  func main() {
    20  	// Prepare the IP to connect to
    21  	addr := &net.UDPAddr{IP: net.ParseIP("127.0.0.1"), Port: 4444}
    22  
    23  	//
    24  	// Everything below is the pion-DTLS API! Thanks for using it ❤️.
    25  	//
    26  
    27  	certificate, err := util.LoadKeyAndCertificate("examples/certificates/client.pem",
    28  		"examples/certificates/client.pub.pem")
    29  	util.Check(err)
    30  
    31  	rootCertificate, err := util.LoadCertificate("examples/certificates/server.pub.pem")
    32  	util.Check(err)
    33  	certPool := x509.NewCertPool()
    34  	cert, err := x509.ParseCertificate(rootCertificate.Certificate[0])
    35  	util.Check(err)
    36  	certPool.AddCert(cert)
    37  
    38  	// Prepare the configuration of the DTLS connection
    39  	config := &dtls.Config{
    40  		Certificates:         []tls.Certificate{certificate},
    41  		ExtendedMasterSecret: dtls.RequireExtendedMasterSecret,
    42  		RootCAs:              certPool,
    43  	}
    44  
    45  	// Connect to a DTLS server
    46  	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
    47  	defer cancel()
    48  	dtlsConn, err := dtls.DialWithContext(ctx, "udp", addr, config)
    49  	util.Check(err)
    50  	defer func() {
    51  		util.Check(dtlsConn.Close())
    52  	}()
    53  
    54  	fmt.Println("Connected; type 'exit' to shutdown gracefully")
    55  
    56  	// Simulate a chat session
    57  	util.Chat(dtlsConn)
    58  }